Presser-foot attachment for sewing machines



E. J. MALONEY.

PRESSER FOOT ATTACHMENT FOR SEWING MACHINES.

APPLICATiON FILED DEC. 6, 1920.

1 ,4 1 ,797, Patented July 4, 1922.

UNITED STATES PATENT OFFICE.

EDWARD J". MALONEY, OF LONG ISLAND CITY, NEW YORK, ASSIGNOR TO ANDREWWOLF, OF NEW YORK, N.

PRESSER-FOOT ATTACHMENT FOE. SEWING MACHINES.

Application filed December 6, 1920.

To all whom it may concern:

Be it known that I, EDWARD J. MALONEY, a citizen of the United States ofAmerica, residing at Long Island City, in the county of Queens and Stateof New York, have invented certain new and useful Improvements inPresser-Foot Attachments for Sewing Machines, of which the following isa specification.

The present invention relates to a presser foot attachment for sewingmachines, particularly of the class known as concealed stitch strawsewing machines.

In machines of this character it has hitherto been necessary to providea different presser foot and work guide for each class of braid.Likewise braid of different thicknesses requires special combinationfoot and guide so that the work may be properly held and guided. Hencewith the old machines many different kinds of comparatively expensivepresser feet and guides are required.

The object of my invention is to greatly reduce the variety of presserfeet and work guidesby providing a construction in which the presserfoot and work guide are made of separate parts and adjustable so thatvarious thicknesses, widths and shapes of braids can be treated.

Another important object of my invention is to so construct the devicethat the work guide and presser foot can be adjusted independently fromeach other, to thereby prevent the crushing of delicate beads or edges.

With my invention three sizes of presser feet and work guides willaccommodate all possible styles, widths and thicknesses of braid. Whilethe smaller size will guide the larger braid satisfactorily, I providethe largest sizes with the particular object of in creasing the wearingsurface.

The construction of the sewing machine to which my invention is designedto be applied, is well known and I shall show and describe only so muchof the machine as is necessary for the understanding ofthe manner ofattachment and operation of my invention.

In the accompanying drawing in which similar reference characters denotecorresponding parts, Fig. 1 is a top plan view of Specification ofLetters Patent.

Serial No. 428,432.

front end elevation thereof; Fig. 3 is a section on line 3-3 of Fig. 1;Fig. 4 is a section on line H of Fig. 1; and Fig. 5 is a top plan viewof the work guide.

Referring tothe drawing more in detail, 10 denotes the supporting armfor the presser foot attachment, which arm is a part of the sewingmachine, of well known con struction and which extends above the throatplate'll. The pressser foot attachment con sists of two separate parts,namely, the work guide 12 and the presser foot 13, each made in theusual shape, as shown in the drawing, the surface 12 of the work guideserving as pressure surface and the forwardly projecting extension 12 aswork support. The upper face of the work guide is provided with a rib orgib 12 having a central threaded bore 12 This gib 12 is adapted toslidably engage a longitudinally extending groove 10 provided in theunderface of the arm 10 so that the work guide 12 can be adjusted inhorizontal direction. Rotatively borne on the upper face of the arm 10is a lever 14 Patented July 4., 1922. j

having at one end a knob or handle 15 and at its opposite end adownwardly projecting stud 16 engaging a cross slot 10 in the arm 10 andserving as fulcrum. A binding screw 17 freely passing through aperforation 1-1 in the lever 14 is screwed into the threaded bore 12* ofthe work guide 12. By means of said screw bolt 17 the work guide can bedrawn to be in contact with the underside of the arm 10. Between acollar 17 of the screw and the lever 14 I provide a spring washer 18whereby the lever 14 is held in frictional contact with the upper faceof the arm 10.

The horizontal adjustment of the work guide is obtainedby the turning ofthe lever 14:, in consequence of which the hindingscrew shifts the workguide along the arm 10 whileits stud 16 acting as fulcrum slides in therecess 10 To accommodate the high points of coarse braids a clearance 20is provided between the surface 12 and the pressure surface 12' of thework guide as clearly shown in Fig. 3.

The presser foot 13 provided with the stitch hole 13' is adapted to beadjustably supported on the arm 10 in front of the work guide 12. Tothis end it is provided with a neck portion 13 formed with a threadedbore 13 in which works a vertical adjusting screw 21. The latter isprovided with two superposed collars 22 22 which bear on the upper andlower faces of the arm 10 around the hole 10 through which the screwbolt 21 loosely passes into the presser foot 13. On each side of theneck 13- a vertical guide pin 23 is provided which is screwed into orotherwise fixed in the presser foot. These pins 23 are adapted toproject through and slidably bear in guide holes 2t provided in the arm10. By turning the screw 2i in one or the other direction the presserfoot will be adjusted vertically to fit different thicknesses of braid.

The finished work 26 is held under the presser foot 13 while the braid27 to be attached is held under the pressure face 12 or the work guide12, with one of its edges below the adjoining edge of the work so thatthe needle (not shown) during the operation of the machine passingthrough the stitch hole 13 will form the stitch 28.

\Vhat I claim and desire to secure by Letters Patent is:

1. In a presser foot attachment for sewing machines, the combinationwith a supporting arm, 01 a presser toot, a screw bolt rotativelysupported in said arm so as to be held against relative upward movementand working in said foot and guide pins for guid ing said footvertically.

2. In a sewing machine the combination with a stationary arm, of avertically adjustable presser loot having a threaded bore, a verticalscrew bolt rotatively supported in said arm but held against relativevertical movement, said bolt working in said bore and lateral guidemembers tor said presser foot.

In testimony whereof I allix my signature in presence o'l two witnesses.

EDWARD J. MALON EY.

Witnesses Goes MoN'rRosE, MAX Rosn.

